How to move on? My date said he's not ready for something serious?

Met this guy on tinder September of 2014. We texted everyday, mostly he initiates first. We first met December of the same year and had 4 dates since then. we text everyday morning til night time cuddled a little bit in our dates, link arms, it all seems okay. He said he likes me after our first date. Yesterday, i learned he went on a date with someone else. I asked him what he thinks and said he's not ready for something serious. now we dont talk at all and the emptiness is killing me.